Steam-heatimg system



June 5,1928, Re. 16,985 E. SHULTZ STEAM HEATING SY$TEM Original FiledJune 12, 1926 V Qffzvenfzfi":

Earle 5771: if;

Reis'aued 5, 1928.

UNITE STATES Re. 16,985 PATENT OFFICE.

EABLE SHULTZ, :OE GHICAGO, ILLINOIS, ASSIGNOR '10 WARREN WEBSTER & GOI-PANY, OF 'CAMDEN, NEW JERSEY, A. CORPORATION OF NEW JERSEY.

STEAM-HEATING SYSTEM.

Original-Io. 1354;759, dated January 3, 1928, Serial 1T0. 115,624, filedJune 12,1926. Application for reissue filed February 25,

This invention relates to an improved system whereby the quantity ofheat supplied to the heating system of a building, in, order to maintainin that building a constant temperature, is automatically regulated tobe the amount necessary to replace the heat lossesfrom the buildingcaused by the difference in temperature between the interior of thebuilding and the exterior air, and by means of which the quantity ofheat supplied to a building during the night, or other periodsaoflimited or non-use, can be automatically reduced or shut off entirelyfor a length of time dependent upon the difference between the insideand outside temperatures; The important object of the invention is toaccomplish these results by means of simple and eflicient mechanism anarrangement operatingentirely automatically under the control oftemperature and time.

My improved regulating system is applied to heating systems in which aheating element such as steam is supplied to heating units such asradiators. Each radiator is, in accordance with my regulating system,provided with a restricted or metered inlet orifice, and in the steamsupply pipe for the radiators is inserted a pressure regulator orreducing valve which is so set or adjusted, that if unhindered, it willpermit flow of steam at the'maximum pressure needed to' supply themaximum quantity of heat to the. heating system. With this pressureregulator I associate an operating member or adjustment varying memberpreferably in the form of a solenoid whose energizing circuit is in turncontrolled by a relaysole noid, and for controllingthe operation of thisrelay-solenoid, I adjust its electrical circuit by 'a temperaturecontrolled regulator subjected preferably to' the temperature outside ofthe building in which the heating is being regulated. i

There aretimes, as for example during the night. when-it maybe desirableto reduce or to shut off the heating, entirely- I also provide as partof my system airegulator which is controlled conjointly by the outsidetemperature and'the time tomodify the operation of the operatingsolenoid to cause the reduction in or shutting off of the heat suppliedto the radiators. This regu- 1928. Serial No. 257,040.

lator means automatically determines the portion of the day during whichnormal heat shall be supplied and that portion of the day or nightduring which the supply shall be reduced or cut off.-

Another important object of the invention is to provide such structureand arrangement that, upon failure of any of the various regulatingdevices to operate properly, the heat will be turned on full, thuspreventing any damage to the heating system or the building by freezing.

Referring now to the drawings, the figure representsdiagrammatically thevarious operating and controlling elements, electrical circuits thereforand the cooperation thereof to produce'the results hereinbeforeenumerated.

The heating system shown comprises the radiator units 1 connected with asupply pipe and with a return pipe 3 through which the condensed steamgoes back to the boiler. In thesteam inlet of each radiator is arestricted orifice 4 which may be in the form of a metering bushing ornozzle structure ordinarily used for restricting the flow of fluid.

Interposed in the steam supply pipe 2 is the pressure regulator orreducing valve structure 5 which may be of any standard make, and bymeans of which is regulated the pressure under which steam will flow tothe radiators of the heating system. In the type of valve structureshown, the valve plug 6 is secured on the stem 7, a spring 8 pressingagainst the valve plug and tending to hold it in closed position. At itslower end the valve stem ispivoted to the inner end of a balance lever 9which close to the valve stem pivot connection is pivoted on thebracket10 extending from the valve frame, the outer end of the lever adjustablreceiving the weight 11. In accordance wit my invention, this weight isplaced and remainsat that point on the lever at which the valve 6 willbe positioned to permit the .steamfnto flow ate the 'maximum pressureneeded to supply the maximum vquantity of heat the heating units. Theoperation of my system then contemplates modificationof such valvesetting or adjustment under sponsive r sponsive member may be of anyspecial or The operating solenoid A forms part of the control for thepressure regulating valve and is directly associated therewith. Itcomprises the solenoid core 12 and the energizing winding 13, the corebeing connected by a link 14 with the outer end ofthe valve lever 9. Thesolenoid, under varying degree of energization, will oppose the pull ofthe weight 11 so that the arm will be raised and lowered to vary theadjustment of the pressure regulator valve structure 5.

he operating solenoid is controlled in accordance with the variation inthe temperature of the outside air by the regulation of the resistanceof the solenoid energizing circuit by means of a relay solenoid B, whoseoperation is directly controlled by variations in the temperature of theoutside air. This relay solenoid comprises a core 15 and an energizingwinding 16, this winding being included in the energizing circuit whichincludes a battery 17' and a temperature remember 18. This temperaturere- That shown is in the form of a thermometer tube through whichextends a resistance wire 19 and in which is mercury 20. The resistancewire is includstandard design.

ed in the energizing circuit for the relay B and as the mercury risesand falls in the tube, due to changes in temperature, more or less ofthe resistance wire will be short circuited by the mercury and theresistance in the relay energizing circuit thus correspondinglydecreased or increased.

The relay core 15 has a rod 21 extending upwardly therefrom whichcarries-a contact finger 22 in electrical engagement therewith.Extending from the upper end of the rod 21 is a spring 23 which isadjustably an c'hored to a supporting bracket 24 by means of a screw 25.This spring acts in opposition to themagnetic pull of the energizingwindinglG 0n the core 15 and tends to hold the core out of the winding.The spring and the energizing winding thus together control the verticalmovement of the rod 21.

Adjacent to the path'of the contact finger 22 is a resistance coil 26with which the contact finger engages during vertical movement of ther0d.21. The lower end of this resistance coil is connected by theconductor 27 with one terminal of the energizing winding. 13 of thesolenoid A, the other terminal of the winding connecting throughconductor 28 with the supporting bracket 24, a battery 29 being includedin the conductor 28. As the rod 21 is vertically moved, more or less ofthe resistance 26 will be included in the energizing circuit for therelay'A, such circuit being from the batter 29 through conductor 28,spring 23, 1'0 21, contact finger22, resistance 26, conductor 27, andthrough the solenoid winding back to the battery. As the pressuresrequred in the heat carrying medium, such as steam,-do not vary insimple proportion to the difi'erence in temperature between the insideand outside of the building to be heated, but as a power of thatdifference, the resistance 26 has its turns graduated and, in thearrangement shown, the diameters of the turns increasetoward the upperend of the resistance coil so that the resistance will increase morerapidly as the outside temperature falls. Such rapid acceleration oftheresistance 26 as the temperature falls will correspondingly reducethe current flow through the energizing circuit of the solenoid willthen permit the pressure regulating valve to quickly increase the supplyof steam to the radiators. To assist in the proper adjustment of theenergizing circuit for the solenoid A, a manually adjustable resistancedevice 30 may be included in the energizing Cll'Cllll). 1 I u Thus theamount of heat supplied to the radiators is automatically regulated inproportion to variations in outside temperature, as indicated by thethermometer 18. During the day normal heat control is desirable, butduring the night, or certain parts thereof, it may be desirable tomaterially reduce A which or to entirely cutoff the heat supply. Suchrelay solenoidB. The time controlled r'egu-.

lator comprises a clock 31 whose hour hand 32 makes one revolution in 24hours. As the hand revolves, it makes consecutive wiping contact withcontact pins 33 selectively set at the time divisions of the clock dial,the annular panel 34 of insulating material being shown as supportingthese contact pins and insulating them from each other. I have showncontact pins set at the divisions for the hours 1 to 8 a. m., and thehours 4 to 11 p. 111. The pins for the hours 1 to 8 are connected by theconductors 35 with a vertical row of contact buttons 36 on a bar 37 ofinsulating material positioned adjacent to the upper end of the solenoidrod 21 at the left side thereof. Similarly, conductors 38' connect thepins for the hours 4 to 11 with the vertical row of contact buttons 38on the at the right of the rod 21. Each bar thus has eight pins and thepins of the opposite rows are horizontally aligned. Contact blades 40and 41 extend laterally in op site directions from the upper end of therod 21 for engagement, respectively, with the contact buttons 36 and 38as the solenoid rod 21 moves vertically, these-blades being insulatedfrom each other and from the rod 21. The contact button supporting barsare preferably adjustable longitudinally as by means of screws 42mounted on supportingbrackets 43.

bar 39 positioned opposite the bar 36 the armature tongue is connectedby a tension spring 48 with the bracket 24 so that as the tongue isswung into engagement with either electromagnet pole it will be held insuch position by the spring until pulled out of such position by theattraction of the other electromagnet. A conductor 49' connects thecontact blade 40 with one terminal of the winding of the electromagnet44 whose other terminal is connected with one pole of the battery 50while a conductor 51 connects the contact blade 41 with one terminal ofthe winding for the electromagnet whose other terminal connects with thesame pole of the battery, the .other pole of the battery being connectedwith the clock through conductor 52. 7

Associated with the electromagnet 45 is a contact 53 which is engaged bythe armature tongue when the electromagnet is energized, and thiscontact is connected by conductor 54 with a contact member 55 insulatedfrom the re la-y rod 21 but adjustable longitudinally thereon adjacentto the contact finger 22 and being adaptedto engage with the resistance26 as the rod 21 moves vertically.

The electromagnets 44 and 45, the. contact button bars 37 and 39 and thevarious supporting brackets may be mounted on a panel 56 on which mayalso be mounted a guide fitting 57 for the relay rod 21.

\Vith the above arrangement two sets of time circuits are formed. Thefirst set includes the conductors 38 and these circuits may be calledshut-off circuits, each circuit extending from the battery through theclock hand,-thro"ugli one of the conductors 38', the correspondingcontact button on the bar 39, the contact blade 41, conductor 51,electromagnet. 45, and back to the battery. The other set of circuitsincludes the conductors 35 and these circuits may be called turn-oncircuits. Each extends from the battery through the clock hand, throughone of the conductors 35, the corresponding contact button on the bar37, conductor 49, electromagnet 44, and back to the battery. Theelectromagnet 45 may therefore be called the shut-ofi' electroinagnetand electromagnet 44 may be called I the contact buttons, readingdownwardly,

, correspond with the hour pins to 8, and

on the bar 39, going upwardly,'thecontact buttons correspond with thehours 4 to 11. Therefore, when the contact blades 40 and 41 have beenshifted by the solenoid B into engagement with certain contact buttonson the bars 37 and 39, therespective circuits will not be closed untilthe hour hand engages With the time pins connected with the I respectivecontact buttons. As the contact blades 40 and 41 receives their-movement from the solenoid B, the particular contact buttons 36 and 38engaged thereby, is dependent upon outside tempe-rature, and as thecontact buttons are connected, each with a particular contact pin ontheclock. it follows that the first closure of a shut-off or turn-oncircuit in accordance with temperature will determine the time at whichsuch circuit will have its final closure made 'by the clock hand. Thewarmer the outside temperature, the earlier the shuteofi' circuit willbeclosed, and the warmer the outside temperature, theflater the turn-oncircuit will be closed. I

\Vhen a shut-off circuit is closed, the electromagnet 45 will beenergized and will draw the armature tongue 46 against the contact 53and this closes a shuntcircuit including the contact member 55,conductor 54, contact 53, armature tongue 46, spring 48, and the bracket24. \Vhen the shunt path is closed,

the energizing current for solenoid A, in-

stead of flowing through the spring '23, rod

21 and contact finger 22 to the resistance 26,

will flow through the shunt path to the resistance at a point below theengagement of the contact finger 22 with the resistance so that thecurrent flow through the energizing circuit will be increasedproportionate to the resistance removed from the circuit and measured bythat part of the resistance coil '26 between the contacts 22 and 55.Such reduction in resistance causes increase of the current flow throughthe energizing circuit and greater attraction of the solenoid core 12 sothat the pressure regulating valve will be adjusted to reduce the steamflow.

The contact member 55 being adjustable relative to the contact finger22, the degree of resistance reduction can be adjusted for.

bar should have a length not less than the length of the coil 26-so thatif 'the contact member 55- is adjusted to be at a distance froin'thecontact finger 22 equal to the length of the coil 26, it will alwaysmake contact with the extension 58 and never with the resistance 26, nomatter what the position of the rod 21'may be during its range ofmovement. If the contact member 55 is at v Jthe posit-ion of the rod 21.

a less distance from the contact finger 22, it will either make contactwith resistance 26 or with the extension 58, depending'upon As soon as aturn-on circuit is closed, the electromagnet 44 will withdraw thearmature tongue from the contact 53'to open the shunt circuit, and theenergizing circuit for the solenoid A will be controlled directly by themovement of the contact finger 22 to effect normal heating regulation.The time controlled regulator thus determines during what portion of theday there shall be normal heat regulation and during which part of theday or night the heat supply shall be reduced or cut off.

Briefly reviewing the operation, the drawing shows the 5 oclock a. m.turn-on circuit closed, which means that the temperature issuch at 5oclock in the morning that the heating system should begin its operationunder normal control. If the outside temperature were lower the currentflow through the solenoid B would be less and when the outsidetemperature is comparathe rod 21 would be correspondingly raised by thespring 23 to set the turn-on circuit for final closure by the clock. Forexample, if the rod 21 had been raised to the button connected with thethree oclock pin, .then

when this pin were engaged by'the hour hand at 3 oclock a. 1n. the shuntcircuit would have been broken and the heating system restored to normalcontrol. If the outside temperature were high. the turning on of thesystem for normal regulation would be delayed.

The normal regulation continues usually during the day. and reduction orshut-ofi of the heat is desirable at night at a time detively low,-closure of the shut-ofi circuit may be delayed until say 11 oclock p. m.

It will be noted that in the case of accidental opening of theenergizing circuit for the solenoid B, the spring 23 would raise the rod21 to cause the contact finger 22 to include all the resistance 26 inthe energizing circuit for the operating solenoid A sons to de-energizethis solenoid and permit the weight 11 to adjust the pressurecontrolling valve for the full flow of steam. Likewise, should theenergizing circuit, for the solenoid A accidentally become interrupted,the solenoid would be tie-energized and the pressure regulating valvewould turn the steam on full. The heating system would,

therefore be protected against freezing during cold weather should suchaccidental current interruption occur.

I thus produce asimple, reliable and eflicient regulation system which,in accordance with variations in outside temperatures, accuratelycontrols the supply of heating element to heating units, and whichautomatically reduces or entirel shuts oif the heat supply to the unitsdurlng desired time periods.-

I claim as follows 1. In a heating regulation system, the combinationwith a pressure regulating valve for regulating the pressure of fluidheating medium, of an operating electromagnetic device connected withsaid valve to control the operation thereof, an energizing circuit forsaid electromagnetic device, an electromagnetic relay controlling theresistance of said energizing circuit, an energizing circuit for saidrelay, and a device responslve to outside temperature for controllingsaid relay circuit whereby said ,operating electromagnet will controlsaid valve in accordance with variations in outside temperature.

2. In a heating regulation system, the combination with a regulatingvalve for regulating the flow of heating fluid to a. heating system, anelectromagnet device connected with said valve to control the operationthereof, an energizing'circuit for said device, means automaticallycontrolled in accordance with variation in outside temperature foradjusting the resistance of said energizing circuit, and time controlledmeans for automatically modifying said energizingcircuit atpredetermined time periods.

'3. In a heating regulation system, the combination with a regulatinvalve for controlling the flow of heating uid, of an electromagneticdevice connected with said valve to control the operation thereof, anenergizing circuit for said electromagnetic device, a variableresistance for said circuit,

means controlled by outside temperature for adjusting said resistance,and time controlled means for automatically modifyingsaid resistance atpredetermined time periods.

4. The combination with a heating system,

of a regulating valve, an operating electromagnet device for operatingsaid. valve, an energizing circuit for said device, and temperaturecontrolled and time controlled mechanisms cooperating to adjust theresistance of said energizing circuit and thereby control the operationof said operating de-- vice.

5. The combination with a heating system,- of a regulating valve forcontrolling the flow of heating medium tosaid system, an electromagneticoperating device connected to control the operation of said valve, anenergizing circuit for said device, a resistance for portioned saidcircuit, means controlled in accordance With outside temperature foradjusting said resistance,

and time controlled means cooperating with the temperature controlledmeans forshort circuiting part of said resistance at predeterminedtimes.

6. The combination with a of a regulating valve for regulatin of heatingfluid, an electromagnetic operating device connected with said valve tocon-' trol the operation thereof, an energizing circuit for said device,a variable resistance for said circuit, a relay electromagnet associatedwith said resistance to control inclusion thereof in said circuit, anenergizing circuit for said relay automatically controlled" inaccordance with outside temperature, a shunt circuit for shunting partof said resistance, and time and temperature controlled meanscooperating to determine the closure of said shunt circuit.

7. The combination with a heating system, of a regulating valve. forregulating the flow of heating fluid, an electromagnetic operatingdevice connected with said valve to control the operation thereof, anenergizing circuit for said device, a resistance for said circuit forcontrolling the current flow therethrough, a shunt circuit associated.with said resistance, and clock controlled means for controlling theconnection of said shunt circuit.

8. The combination with a heating system, of a regulating valve forregulating the flow of heating fluid to the system, an electromagneticoperating device connected with said the flow regulating valve tocontrol the operation thereof, an energizing circuit for said de vice,a' variable resistance for said circuit, temperature controlle means forcontrolling the adjustment said resistance, decrease ot-said' resistancecausing said operating device to control the valve to decrease theheating fluid supply, a shunt circuit associated with said resistance,and clock controlled means governing the connection of said shuntcircuit, closure of the shunt circuit decreasing the resistanceindependently of said resistance adjusting mechanism.

9. In an automatically regulated heating system, the combination ofheating units each having a restricted inlet opening so prothat thequantity of heat carrying medium admitted to the unit can be regulatedby variations in pressure in the heat carrying medium, apressureregulator for var ing the pressure in the heat carrying me ium,and a temperature controlled regulator for automatically controllingsaid pressure regulator. v

10. In an automatically regulated heating system,; the combination ofheating units each-having restricted inlet openings so proportioned thatthe quantity of heat carrying medium admitted to the unitcan bereguheating system,-

for modifying Sure regulator to latedby variations in pressures in theheat carrying medium, apressure regulator for varying the pressure inthe heat carrying medium, operating means for automatically controllingthe. operation of said regulator, means dependent/upon outsidetemperature for controlling the operation of said operating means, andadditional means controlled conjointly by outside temperatureand timedthe operation of said operating means to cause operation of saidpresdetermiued time period the quantity of heat' supplied to the unit. a

11. In combination with a heatingsystem comprising heating units, apressure regulator for varying the pressure in the heat carrying medium,operating means for operating said pressure regulator, means dependenton outside temperature for auto matically controlling the operation ofsaid operating means to cause operation of the pressure regulator inaccordance with outside temperature, and additional means controlled bytime and dependent upon outside temperature for modifying the operationof the operating means during predetermined time periods to causeadjustment of the pressure regulator to shut down the quantity of heatsupplied to the heating system.

12. The combination with a heating system, of a regulator forcontrolling the flow of heating medium to said system, anelectromagnetic operating device connected with said regulator tocontrol the operation thereof, an energizing circuit for said device, a'variable resistance in said circuit, a relay electromagnet device and acontact moved thereby in association with said resistance, an energizingcircuit for said relay electromagnet and a device responsive to outsidetemperature for controlling the current flow through said energizingcircuit whereby said resistance will be adjusted to control theenergizing circuit for the operating'electromagnet in accordance withoutside temperature, an additional contact adapted totravel reduceduring a certain prewith said first mentioned contact in 'associationwith said resistance, a shunt circuit including both contacts, coils insaid shunt circuit causing short circuiting of that part of theresistance which is between said contacts whereby the op'eratibn of saidoperating device will be modified, and time controlled means closingsaid shunt circuit at a certain time, dependent upon theoutsidetemperature at such-time.

13. In combination with a heating system comprising heating units, of aregulator for regulating the flow of heating medium to said units, anelectromagnetic operating device connected with said regulator tocontrol the operation thereof, an energizing circuit for said operatingelectromagnet, increased current flow through said circuit causingopera.-

. perature for moving to vary the amount energizing shut-01f circuitseach including said electromagnet, a time device for causing a shut-oilcircuit at a certain time dependent upon the outside temperature at thattime whereby the shunt circuit will be closed and the resistance in saidenergizing circuit reduced to lating valve,

adjust cause operation of the operating device to said regulator fordecreased flow of heating medium, and a second electromagnet controllingthe opening of said shunt circuit, turn-on circuits each including saidsecond electromagnet, and a time device for causing a circuit throughsaid second electromagnet at a certain time dependent upon thetemperature at such time whereby said shunt circuit will be opened andcurrent flow through said operating device restored to normal.

14. In combination with a heating system comprising heating units, aregulating valve for regulating'the flow of heating medium to the unit,an electromagnetic operating device controlling the adjustment of saidreguan energizing circuit for said device, means dependent upon outsidetem perature for regulating the current flow through said energizingcircuit, and additional means controlled by time and outside temperaturefor modifying the current flow through said energizing circuit during acertain period whereby to cause adjustment of the regulator valve todecrease the quantity of heating medium flowin to the heating systemduring such peri p 15. In combifiation' in a heating system, a

plurality of radiators, a common supply 'diators, each radiator main forsupplying heating fluid to said rasupply'main through a regulable butnormally fixed orifice to control the rate of flow to the respectiveradiators for a given'pressure in the supply main, andmea'ns responsiveto temperature to regulate the pressure of the heating fluid in saidmains.

16. In 'a heating system, the combination of a supply main for heatingfluid, a plurality of radiators having\connection with said ma1n throughorifices for controlling the relative flow of heating fluid to eachradiator, a pressure regulator in the supply main for. maintaining. a 7given pressure of the heating fluid supplied to said orifices, and

being connected to the means responsive to temperature 'for controllingthe setting of said regulator.

17. In a heating system, a radiator having a fixed orifice to controlthe inlet of heating fluid thereto, a supply main for heating fluid tobe supplied to said orifice, a pressure regulator for holdin apredetermined pressure upon said oriii ce, and temperature responsivemeans for controlling the setting of said regulator so that the rate offlow of heating fluid through the orifice to the radiator is adjusted tothe requirements for heat to be given as by the radiator. I

18. In a heating system, the combination of radiators each having arestricted inlet opening so proportioned that the quantity of heatcarrying medium admitted thereto can be regulated by variations in thepressure of the heat carrying medium, 'anautomatic pressureregulaton'for varying the pressureof the heat carrying "medium,adjustment varying'means for varying the adjustment of said automaticpressure regulator, and temperature controlled means governing saidadjustment var/y ng means.

19. In a steam heating systempthecombination of radiators each havingarestrict- I ed inlet opening so proportloned that the quantity of steamadmitted thereto can be regulated by variations in the pressure of theheat carrying medium, an automatic regulator for varying the pressure ofthe can be regulated by variations in the pres-- sure of the heatcarrying medium, an automatic pressure regulator for controlling thepressure in the heat carrying'medium, regulable means for varying thesetting of the pressure regulator, and temperature controlled meansgoverning such regulable means Whereby'it may automatically vary thesetting of the pressure regulator commensurate with variations intemperature.

' 21. In a'heating system for-a building, the combination of a pluralityof radiators therein each having arestricted inlet ing so proportionedthat the quantity of heat carrying medium admitted thereto can beregulated by variations in the pressure thereof, an automatic regulatorfor varying the pressure of the justment varying means for varying theadjustment" of said pressure regulator, and thermally sensitivemeansexposed to variations in temperatures external to the building forgoverning the adjustment varying means.

carrying medium admitted thereto openheat carrying med1um, ad-

22. In a heating system for a. building,

the combination of a plurality of radiators therein each having an inletopening so proportioned that the uantity of heat carrying medium admittethereto can be regulated by variations in the pressure of the heatcarrying medium, an'automatic pressure regulator forvarying the pressureof the heat carrying medium, regulable means .for varying the setting ofthe pressure regulator, and temperature controlled means governing saidregulable means whereby it may automatically vary the setting of thepressure regulator commensuratewith variations in the atmosphericconditions external to the building.

23. In a heating system, the combination I of heating units having eacha restricted inopening so proportioned that the uantity of heat carryinmedium admitted thereto can-be regulate by variations in" thepressure'of the heat carrying medium, an automatic pressure regulatorloaded to a variable degree for varying the pressure of the heatcarrying medium, means for loading said regulator to avariable degreecomprisin motor means and a temperature controlled device for'governingthe action of said motor means.

25.- In a heating system for a building, the

combination of heating units each having a restricted inlet opening soproportioned that the quantity'of heat carrying, medium admitted theretocan be regulated by variations in the pressure of the heat carryingmedium, a loaded diaphragm pressure regulating valve for automaticallyregulating the pressure of the heat carrying medium, means for varyingthe loading of said valve comprising motor means and a temperaturecontrolled device subject to temperature outside of the building forgoverning the action of said motor means.-

In witness whereof, I hereunto subscribe my name this 1st day ofFebruary, 1928."

EARLE/SHULTZ.

, DISCLAIM E R Re. 16,985.Earle Shultz, Chicago, STEAM Hns'rme SYsrnM.'Patent,dated June 5, 1928. Disclaimer filed December 10, 1934, by theassignee, Warren Webster cfc Company. s Hereby enters this disclaimer tothose claims which are numbered 9, 15, 16, 17, I8, 119, 20, 21, 22, 23,24 and 25 in said reissue patent, and which are in the following wor s,to wit:

the heatjca medium, a pressure regulator for varying the'pressure 1n theheat carrying medium, and a temperature controlled regulator forautomatically controlling I said pressure regulator. v Y

15. In combination in a heating system, a pluralityof radiators, acommon supplymain for su plying heating fluid to said radiators, eachradiator being connected to the supp y main through a regulable butnormally fixedorifice to control the rate of flow to the respectiveradiators for a given pressure in the su ply main, andl means responsiveto temperature to regulate the pressure of the heating fluid in emmains.

. the relative flow of heating fluid to each radiator, afpr'eissure'ieglulaton 111i]? supply u1 supp e tosai o ces,an

requirements for heat to be given off b the radiator.

18.11! a heating system, thecomb .ihlet op um; so proportioned that thequantity of heat carrying medium admitted jthereto can 0 regulated bvariations in the pressure of the heat carrying medium, -Ian-autornaticpressure reg atorfor varying the pressure of the heat carrying medium, 1adjustment varying means for varying the adjustment of said automaticpressure regulator, and temperature controlled means governing saidadjustment varying means 19. In a steam heating system, thecornbinationof radiators eachhaving a restricted inlet opening soxproportioned thatthe uantityof steam admitted thereto can 'be' regulated by variations inthe pressure of t e heatcarrying medium, an; auto; matic regulatorjorvarying the pressure of the steam, and means for automaticallyvaryifig-thesettlng of the pressure regulator commensurate withvariationsof tem- JPG 20. In a heating system, the combination ofradiators eachhaviug a restricted inlet ope so proportioned that thequantity of heat carrying medium admitted thereto 03% regulated byvariationsin the pressure of the heatcarrying medium, an automaticpressure regulator for controlling'the pressure in the heat 0 A medium,regulable means for varying the setting of the pressure regulator, andtem- 'cally vary the setting of the pressureregulatorcommensurate withvariations in a temperature. 7 f 21. In a heating system for a.building,-the combination of a lurality of radiators thereineach-having a restricted" at opening so. pro ortioned t at the quantityof heatmedium admitted thereto ean b'e reglfiated by variationsin. the

- regulator, and thermally sensitive means exposed to yariations intemperatures external to the for gove theadjustme'ntvarying means. v i r22. In a heating system for a Euilding, the eombination of a pluralityof radiators therein each having an inlet opening so proportioned thatthe quantity of heat oaT'ng mediumadmitted thereto can be regulated byvariations in the pressure of the eat carrying medlum, an automaticpressure" regulator for varying the pressure i of the heat medium,regulable. means for,varying the setting of the pressure regulator, andtelgfilerature controlled means governing regulable means whereby 1t mayautomati y' vary the settingoffthe p'ressure regulator commensurate withvariations in the atmospheric conditions temperature controlled devicefor governing the action of said motor means.

23. In a heating system, the combination of heating units each having arestricted inlet opening so proportioned that the quantity of heatcarrying medium admitted thereto can be regulated by variations in thepressure of the heat carrying medium, a pressure regulator for varyingthe pressure of the heat carrying medium, means for loading saidregulator to a variable degree comprising motor means and a 24. In aheating system, the combination of radiators each having a restrictedinlet opening so proportioned that the quantity of heat carrying mediumadmitted thereto can be regulated by varlations in the pressure of theheat carrying medium, an automatic pressure regulator loaded to avariable degree for varying the pressure of the heat carrying medium,means for loading said regulator to a variable degree comprising motormeans and a temperature controlled device for governing the action ofsaid motor means.

25. In a heating system for a building, the combination of heating unitseach having a restricted inlet opening so proportioned that the quantityof heat carrying medium admitted thereto can be regulated by variationsin the pressure of the heat carrying medium, a loaded diaphragm pressureregulating valve for automatically regulating the pressure of the heatcarrying medium, means for varying the loading of said valve comprisingmotor means and atemperature controlled device subject to temperatureoutside of the building for governing the action of said motor means.

[Qflio'ial Gazette, January 1, 1935.]

